package com.itheima.info.system.manager.service;

import com.itheima.info.system.manager.domain.Student;

import java.util.ArrayList;

public interface IBaseStudentService {
    //增
    void add(Student student);

    //删
    void delete(String sid);

    //改
    void updata(String sid, Student student);

    //查
    ArrayList<Student> findAll();

    //判断集合是否为空
    boolean isEmpty();

    //判断学号是否存在
    boolean isExist(String sid);
}
